Heel-making machine.



y v PATENTED'OCT. so, 190e.' G. E. WARREN. HEEL MAKING MACHINE.

Arr'mouronr nun 110.155, 1902.

FIQ.

v INVENTOR Y UNITED STATES GEORGE E. WARREN, OF BOSTON, MASSACHUSETTS,ASSIGNORy TO UNITED SHOE MACHINERY COMPANY, OF PATERSON, NEW JERSEY,CORPORATION OF NEW JERSEY.

PATENT oEFIoE.

HEYEL-'MAKmG MACHINE.

Ne. 8e4-,349.

Specification of Letters Patent.

Patented octl 20,1906.y

Application filed December 1.3, 1902. Serial No. 135,029.

Tovwll whom it pray con/cern,.-I

Be itvknown that I, GEORGE E. WARREN, a

`citizen of the- United States, residing at Boslowing tobe a'full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it apper- `tains to make and use thesame.-

y The present invention relates to heel-making machines, and moreparticularly to machines for concaving the tops ofr Wooden heels.

In themanufacture ofcertain classes `of wooden heels it` is the practiceto dispense v with the use of a rand for forming a concavity caving thetop of the heel.

vfoot of the wearer of the shoe.

in the upper surface of the heel to it the heel portion of the solek byscooping out or conconcavity is generally made to conform more or lessvaccurately to the shape of the'lastthat is to say, to the shape of theheel of the Roughly speaking, the concavity should be oblatelyspheroidal at the rear and elliptically cylindrical at .theV front partof the heel.

The object ofthe present invention is to produce amachine for concavingthe tops of heels, whether of wood lor leather or other material, andwhichat onev operation will concave the top of the heel to the desiredshape without dependence upon the skill or judgment of the operator andwith uniformity and speed.

The present invention is especially designed fo`r use in the manufactureofthe heelblocks used in making the heel and counterprotector describedin Letters Patent of the UnitedStates, No. 706,551,Au'gust 12, 1902, l

granted to Wiilliam Gordon and myself.

Topthe'above ends the present invention consists in the devices andcombinations of devices herein described and more particularly definedin the claims.

s The illustrated embodiment of the present invention is constructed asfollows, reference The shape of the:

a stem 21.

beinglhad to the accompanying drawings, in Whic Figure 1,is a plan ofthe machine, and Fig. 2 a sectional elevation.

Upon a suitable table or standard (not shown in the drawings) issupported a'hollow circular trunk 1. a bearing-ring 2 and asupporting-ring 3, connected by spokes 4, is journaledupon the thetrunk. In vertical sleeves-5, carried by the turret, are pivoted'stems6, carryingwo'r-kholders 7. Each work-holder has shoulders- 8 and 9receiving, respectively, the back-j ward anddownward thrust of theworkand a sliding jaw 10, which engages the upper edge of the heel held inthe holder. T-hejaw 10 is dovetailed to slide vertically in the front ofthe holder. A screw-pin 11, fixed in the jaw, projects through avertical slot tothe back of the holder, where it is engaged by'a slottedhand-lever 12, pivoted at 13. By lowering and raising the hand-lever thejaw may be moved into or outpof engagement with the work to hold orrelease it. 4

A rotary cutter-head 14 is fixed to a horizontal shaft 15, journaled at16.16 to 1a bedplate 17, adjustably xed, by means of screws- 18, passingthrough slots in the bed-plate, to a p ate 19, fixed to the upper endof' the trunk 1 by screws 20 and centered thereonfby A pulley 22 servesto rotate the shaft and cutter-head by a belt from asourc'e of power. A

To bring the work-holders and the work held thereby successively inoperative relation with thel cutter-head means for slowly andcontinuously rotating the turretl are provided, comprising an annularworm-wheel '23,

fixed to the bear1ng-ring2 of theturret, and

-a worm 24, mes-hing therewith. The worin is rotated by a shaft 25,journaled on the frame or table ofthe machine and driven by a belt orother connection with a source of .owen

As the turret rotates slowly in t edirection of the arrow the heels orheel-blocks 26 in the work-holders are successively presented to thecutters of the rapidly-rotating cutter-head. The heel is inserted in theholder A rotary turret comprising with the upper surface of the'heelfacing the cutter-head, the breast of the heel being against theshoulder 8. The cutter therefore begins to cut at the rear of the heeland finishes at the breast, and the cutter is arranged to cut downward,so as to hold the heel against the shoulder 9.

In order to iiatten the latter part of the curve described bythecutter-fi. e., to make the latter part of the concavity substantiallyellipticallyy cylindrical-means are provided for slightly turning thework-holders about their stems during the progress of the cut. To thebottom of each'stem 6 is attached an arm27, carrying a cam-roller 28,engaging a cam-path 29 in a cam-ring 31, attached to the plate 19. Thegreater part of the camgroove is concentric with the axis of the turret,andthe work-holders and their stems are v during most of their travelheld by the camarms in such angular relation with the turret that ifthey passed the cutter without change of position the cutter would beginto cut at the upper rearedge of the heel and leave at a point 1n thebreast directly over the axis of the stem 6, describing a circular cutbetween these points; but in order to make the latter part of the cutshallower than it would be under these circumstances an offset 30 ismade in the cam-path. This is engaged by the cam-roller'28- after thecutter has traversed about a third of the heel. The offset causes thework to be swung slightly away from the cutter, so that less material iscut out 3 but the point at which the cutter emerges on the heel willalways be the same, owing to the location of the breast over the axis ofthe stem. In order thatthe heel may be engaged only by the forward edgeof the cutter, its shaft is olfset slightly from the center of themachine, as shown.

It is to be notedthat the present invention is clearly distinguishedfrom those heel-concaving machines of the prior art in which theconcavity conforms to the contour of the cutter, because in the presentmachine the shape of the concavity depends upon the relative movementsof the cutter and work-holder and upon the angle of presentation of theI believe I am the first to make a heel-concaving machine in which therelative movements of the work and cutter are on curved lines, aconstruction which manifestly possesses important advantages over priormachines, in which such motion is rectilinear.

The present invention -is broad and generic in character and by no meanslimited to the embodiment illustrated in the accompanying drawings anddescribed herein, as the same may be embodied in other andwidely-different forms without departure therefrom.

Having thus described the invention, what 1. A heel-concaving machinehaving, in combination, a rotary cutter, a work su port, and means forimparting to the wor support and the cutter a relative motion to causethe cutterto cut transversely of the upper surface of the heel so as toconcave said surface, the axis of rotation of the cutter being inclinedduring the cutting operation to the said surface of the heel butsubstantially parallel to the plane of motion of the work-support,substantially as described.

2. A heel-concaving machine having, in combination, a rotary cutter andmeans for holding a heel and moving it past the cutter in a directioninclined to but in the same plane with the axis of rotation of thecutter, substantially as described.

3. A heel-concaving machine having, in combination, acontinuouslyrotated routing-cutter, a rotary turret, and a plurality ofwork-holders carried thereon, the cutter and turret being so positionedthat heels held in the holders will come in contact successively withthe cutter as the turret is rotated, substantially as described.

4. A heel-concaving machine having, in combination, a rotaryrouting-cutter, a rotary turret carrying work-holders, and means forcontinuously rotating the turret to bring the upper surfaces of heelsheld in the workholders successively into contact with the cutter,substantially as described.

5. A heel-concaving machine having, in combination, a cutter, means forholding 'a heel to be operated upon, means for moving the heel intoengagement with and past the cutter, and independent means for varyingthe depth of the cut during the cutting operation, substantially asdescribed.

6. A heel-concaving machine having, in combination, a cutter, arotatable turret, a work-holder mounted on the turret and rotatableabout an axis parallel to the axis of of the turret, means for rotatingthe turret to bring a heel held in the holder into contact with thecutter, and means to turn the holder about its axis on the turret, whilethe IOO cutterl is operating on the heel to vary the l combination, acutter, a work-support, means for moving the worksupport past thecutter, and means for varying the path of movement of the work-supportduring the time it isl passing the cutter, substantially as described;

8. A heel-concaving machine having, in combination, a rotary cutter, awork-support, means for moving the work-support past the cutter in ageneral direction inclined to the aXis of the cutter, and means forvarying the path of movement of the work-support during the time it ispassing the cutter, substantially as described.

9. A heel-concaving machine having, in combination, a cutter, a n worksupport, means for moving the work-support past the cutter on a curvedpath of motion, and means for flattening the curvature of the path ofmotion of the work-support during the time itis passing the cutter,substantially as described.

10. A heel-concaving machine having, in

c combination, a rotary cutter engaging the upper surface of the heel, aworksupport, and means for positively moving the worksupport and cutterrelatively to each other to cause the work to be presented to the cutterat such angle and to so vary said angle during the concaving operationthat the transverse section of the concavity is Hattened at the centerand so that the longitudinal section of the concavity is curved at oneend 'and substantially flat at the other, substantially asdescribed.

11. A heel-concaving machine'having, in combination, aA rotary cutter, awork-support, means for moving the Work-support past the cutter topresent the work to the cutter .at an angle whereby the section of thecut normal to the plane of motion will be substantially ellipticallycylindrical and means for moving the work-support during the cuttingoperation away from the cutter whereby the section of the cut in theplane of motion will be curved and flattened, substantially asdescribed.`

12. A heel-concaving machine having, in combination, a rotary cutter, aworksu port, primary means for moving the wor support past the cutter onthe arc of a circle and secondary means for swinging the worksupport vasit passes the cutter on a center remote from the primary center ofmotion, substantially as described.

13. A heel-concaving machine having, in combination, a rotary cutter, awork-support, means for revolving the work-support to carry it past thecutter and means for oscillating the work-support as it passes the cut-vter, substantially as described.

14. A heel-concaving machine, having, in combination, a rotary cutter,la Work-support, means for revolving the work-sup ort to bring successiveportions of the wor in contact with the cutter, and means foroscillating the work-support to vary the contour of the cut,substantially as described.

15. A heel-concaving machine, having, in combination, a rotary cutter, awork-support, means for revolving the work-support to carry the Workpast the cutter, and a cam to impart to the cutter and the work-supporta relative se arating movement, substantlally as described).

^ In testimony whereof I afIiX my signature. in presence of twowitnesses.

' GEORGE E. WARREN. Witnesses: HORACE VAN EVEREN, FARNUM F. DoRsEY.

